<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<div class="sanjiao"></div>
	</body>
	<style>
		.sanjiao{
			height: 0;
			width: 0;
			border-bottom: solid 100px #007AFF;
			border-right: solid 300px transparent;
		}
	</style>
</html>
